Adjustable socket wrench



P. FANNEN.

ADJUSTABLE SOCKET WRENCH. g APPLICATION Flu-:n DEc.20. |920. RENEWED SEPT. 1. 1922.

Maggqb www@ m1111922 Patented @et l?,

UNHTED STATES PATRICK LAWRENCE FANN EN OF NEW YORK, N. Y.

ADJUSTABLE SOCKET WRENCH.

Application led December 20, 1920, Serial No. 431,869. Renewed September 1, 1922. Serial No. 585,829.

To all whom. t may concern Be it known that I, PATRICK LAWRENCE F ANNEN, a citizen of the United States, and

resident of New York city, in thecounty of New York and State of New York, have invented certain new and useful Improvements in Adjustable Socket Wrenches, of which the following is a specification.

The object of this invention is to produce a strong and simple adjustable socket wrench for putting on and taking off bolt-nuts and having jaws which are more vconveniently positioned on eitherhomed nuts or on nuts to be turned home than has heretofore been the case; and having a form that permits the wrench to be used in endwise application to the nuts. It oftenhappens that nuts are used in close proximity to some structural part which interferes sometimes with the application of a wrench to a nut and often prevents a continuous movement of the nut engaging jaws in the actuation of a wrench for putting on or taking off nuts. This is especially the case in motor car con* struction wherein wrenches embodying the present invention are particularly useful.-

In the accompanying drawings, forming a part hereof'and illustrating my invention in the best mode now known to me,

Fig. 1 is a side elevation of my new wrench, parts being broken away for greater clearness F fg. 2 is a front end view of the wrench and Fig. 3 is a rear end view thereof partially in section at line 3-3 through theoperating revoluble shaft shown provided with a handle.

Fig. et is a side View of the pintle mei bers in partial telescopic assemblage, these pintle members, in the complete assemblage, l

holding the pair of the wrench levers in hinged relation one to another;

F ig. 5 is a detailed view, partially in section at line 5 assemblage of the pintle members with'the revoluble shaft. v

Referring to that form of my invention which is shown in the drawings, 1 and la, respectively, indicate each of a pair of wrench levers having'tiat opposed surfaces 2 between their end portions,` and exterior walls which are shown cross-section'ally conveX throughout their length. In' the' completed assemblage, the levers 1 and 12L are approximately round in cross-section, per- 5 of Fig. 4, of an operative l mitting an often convenient endwise use of the wrench. The lever 1 has between its ends, transversely opposed projectlng ears 8-3, the edge wall-sof which are arced; the

other lever 1a has transversely opposed projecting ears 3a, the edge walls of which are vbearing surface 3C on which the arced edges of the ears 3a severally abut; and the right hand flat side of each ear 3a (Fig. 3) bears against an opposed vflat side of an'ear 3 at 3d. All these abutting and contacting sur faces have a sliding lit one on another.

The ears are formed with transversely aligned pintle openings for'reception of a pintle whereby the levers are hinged together. comprises a pintle tube 4 having at one end a flange 5, and a telescopic bifurcated pin 6 having at one end a flange '7, the body of the pin fitting the bore of the pintle tube 1, and, in the completed assemblage, having its end that is entrant in the tube 4: upset at 8 on the of a revoluble, operating shaft 11 is entered through the hole 9 in the tube 4, after the tube is inserted through the aligned pintle receiving holes of the lever ears. At its forward end the revoluble 'shaft 11 has a reduced neck portion 12 which terminates in a terminal flange 12a, and whenthe bifurcated pin 6 is inserted in the tube l its bifurcated rib 6b fits-slidingly in the annular groove formed at the neck 12 of the shaft, the arcuate-portion of the rib at the crotch portion 10 bearing on the neck 12, and being between the terminal iiange 12a and the shoulder of the shaft adjacent the neck 12.

Thus thetwo levers wlith their flat inward opposed surfaces 2, facing one another and spaced apart by the projecting ear con- The pintle construction as shown v pintle and in the direction of the extension of shaft 11, each lever is formed with a transverse, three-walled recess having a forward wall 13 that slants inwardly and forwardly lin the general'directionof the pintle; a wall 1-1- shown straight, and; a. rear- Wald bevelled wall 15 that slants outwardly and rearwardly; whereby the two vtransverse walls 13 and 15, of each recess, are divergent and havevtheir inner ends spaced apart vby the intermediate wall 14, the transverse walls13, 141 and 15 of one-lever being opposed to the corresponding walls o f the other lever.l Thefouter end' wall 'of each lever is indicated by 16'and the two walls 16 have their inward ends each spaced apart from the revoluble shaft 11 to forma substantial clearance at 11d between the opposed transversely inward surfaces of the walls 16 and theshaft 11; so that, forwardly of the pintle, the levers may spread apart to a desired distance without -the inward transverse walls of theelevers rearward of the plintle coming into contact with the shaft 11, which is revoluble at will either in the clockwise or in the counter-clockwise direction. This shaft is shown with a bent handle forming extension 11b. Theopposed .three walled recesses" at the rearward ends ofthe levers forma chamber C' for a nonrevoluble nut-wedge yand a threaded portion of the-operating shaft 5 andthe end walls 16 of the levers are severally formed' on' their inner side -with anl outwardly extending guide-slot 17, one slotbeing diametrically opposed to the other', and eachextending` outwardly, in a transverse direction, and forwardlyI into communication with the chamber C. f

That inward portion ofthe 'shaft 11 which passes through the chamber IC listhreaded at 18 for receptionof a nut-wedge 19, having diametrically opposed guide pins 20,

which 4Amay be passed .through the 'diametri-v cally opposed guide-slots 17, and the ends of which are respectively slidable between the side walls 21 yof each 'slot' 17. The free ends of the guide pins2O are long enough always to overlap the margins of the walls 13, 14 and v15, but are short enough always to provide a substantial clearance lat 22 between the end of each guide pin 2O and the opposed laterally outward wall of the chainber C, so that the levers maybe moved Aapart forwardly of the pintle without those lever walls, which are opposed to the free ends of the guide pli1is,'abutting andwbearing I against the free ends of the guide pins.

Forwardly of the vpintle, a leaf spring 23 is fixed at 24 t`o the inner side of 'one ofthe levers, .the free end 25 of the spring bearing against .the opposed wall ofthe other lever;

vand yforwardlyrof this spring, .which tends to `keep the levers spread apart forwardly of theipinftle, the' A.inner sides of .the Vlevers are preferably formedM each vwith a transverse concave serratedwsurface 26, one opposed to the other, whereby, if desired, the wrench may be used flat-wlise for application to a nut. But at their front ends the levers are opposedly formed each with a recess 27 at each side of an inwardly extending lug 28, the end walls of each of which are shown embraced by the laterally spaced apart arms 29 of al swinging, nut-engaging jaw 30 pivotally and. rockably secured to the lug 28 by pivot pins 31. The opposed faces of the nut-engaging jaws 30 are severally concaved and serrated at 31; these opposed serrated concavities vfacing towards an imaginary prolongation ofthe lengthwise aXlis of the operating 1 shaft 11. Consequently, in its principal use my new wrench may be used in endwise application to a nut, the pivotednut-engaging jaws 30 automatically adjusting themselves with reference to the periphery of the nut and their serrated concave surfaces 3l-being then positlioned for engagement with nut corners, upon which j aws 30r are tightly impinged by turning the shaft 11 and thereby forcing the forward rounded corners 32 ofv nut wedgel againstthe forward slanted walls 13 and forcing Jthe jaws 30 towards one another againstthe resistance of the leaf spring 23. In this movement, the shaft 11 is supposed to be yturned in the clockwise" direction. But if, for any reason, the wedge nut 19 is in a neutral position near the 'centrall portion of the chamber C with its guide-pins passing either the intermediate walls 14 or :the rearward walls 15, and it lisdesired to close the jaws 30 Vby a counter-clockwise rotation of the shaft'll, then the rearward corner portions 33 of the nut wedge may be impinged against the rearward walls 15 to spread the rearward ends of the levers apart and force the nutengaging jaws 30 toward one another onta nut.

VVhatI claim is: v f

1. An adjustable socket wrench comprising, in combination a pair of elongated and opposed levers pivotally connectedl between their ends, the levers being` provided forwardly of their pivotal connection with opposed nut engaging surfaces facing the lengthwise axis of the wrench; anda lever closing mechanism comprising a revoluble shaft 'extending in the direction of the levers, the pivoted levers being oppositely recessed at their rearward ends to form, between such ends, 4a chamber for reception of a nut wedge; a nut wedge provided with aY guide pin; the wall of the chambery being formed with a guide wayfor 'said pin to prevent rotation of the nut wedge, and the chamber :being also formed with wallsfor engagement with' the ynut wedge during movement of the latter in said chamber ;fa revoluble' shaft having va threaded portion intermeshing with the threaded bore of the nut wedge; and means for journalling the shaft in operative relation to the levers.

2. In a socket wrench, a pair of levers having opposed hingedorming projecting ears, having arched bearing surfaces and transversely opposed pintle receiving open-r chamber having walls :for engagement by the nut wedge in its travel whereby the front ends of the levers may be moved one towards the other.

3. As a new article of manufacture, a wrench comprising a pair of jaw levers each extending lengthwise of and opposedly to the other; each jaw having between its ends a projecting pivot receiving member, one member being supplementary to the other and in overlapping contact with the other; a pivotal connection for such members; at one side of the pivot and located partially between the jaw levers, an operating shaft the inward end of which has a loose connectionv with said pivotal connection and the other end of which projects as a handle from between the jaw levers; and, connected with the operating shaft, a thereby actuated jaw closing device located between and in Working relation to opposed surfaces of the jaw levers, for closing the jaw end portions at the other side of said pivot.

Signed at New York city, in the county of New York and State of New York, this 17th day of December, A. D. 1920.

FATRHCK LAWRENCE FANNEN. 

